Identifying Size Effects of Pt as Single Atoms and Nanoparticles Supported on FeOx for the Water-Gas Shift Reaction
文献类型：期刊论文
| 作者 | Chen, Yang1,2; Lin, Jian1; Li, Lin1; Qjao, Botao1; Liu, Jingyue3; Su, Yang1; Wang, Xiaodong1 |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2018-02-01 |
| 卷号 | 8期号:2页码:859-868 |
| 关键词 | Water-gas Shift Size Effect Pt Single Atoms Nanoparticles Mechanism |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.7b02751 |
| 文献子类 | Article |
| 英文摘要 | Identification of size effects at an atomic level is essential for designing high-performance metal-based catalysts. Here, the performance of a series of FeOx-supported Pt catalysts with Pt as nanoparticles (Pt-NP) or single atoms (Pt-SAC) are compared for the low-temperature water-gas shift (WGS) reaction. A variety of characterization methods such as adsorption microcalorimetry, H-2-TPR, in situ DRIFTS, and transient analysis of product tests were used to demonstrate that Pt nanoparticles exhibit much higher adsorption strength of CO; the adsorbed CO reacts with the OH groups, which are generated from activated subsequently decompose to produce CO2 and H-2 simultaneously. On the other hand, Pt single atoms promote the formation of oxygen vacancies on FeOx which dissociate H2O to H-2 and adsorbed O that then combines with the weakly adsorbed CO on these Pt sites to produce CO2. The activation energy for the WGS reaction decreases with the downsizing of Pt species, and Pt-SAC possesses the lowest value of 33 kJ/mol. As a result, Pt-SAC exhibits 1 order of magnitude higher specific activity in comparison to Pt -NP. With a loading of only 0.05 wt % the Pt-SAC can achieve similar to 65% CO conversion at 300 degrees C, representing one of the most active catalysts reported so far. |
| WOS关键词 | DENSITY-FUNCTIONAL THEORY ; NOBLE-METAL CATALYSTS ; IN-SITU DRIFTS ; CO OXIDATION ; HYDROGEN-PRODUCTION ; CARBON-MONOXIDE ; PREFERENTIAL OXIDATION ; MECHANISTIC ASPECTS ; ROOM-TEMPERATURE ; PARTICLE-SIZE |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000424735000014 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/168744]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Lin, Jian; Wang, Xiaodong |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA |
| 推荐引用方式 GB/T 7714 | Chen, Yang,Lin, Jian,Li, Lin,et al. Identifying Size Effects of Pt as Single Atoms and Nanoparticles Supported on FeOx for the Water-Gas Shift Reaction[J]. ACS CATALYSIS,2018,8(2):859-868. |
| APA | Chen, Yang.,Lin, Jian.,Li, Lin.,Qjao, Botao.,Liu, Jingyue.,...&Wang, Xiaodong.(2018).Identifying Size Effects of Pt as Single Atoms and Nanoparticles Supported on FeOx for the Water-Gas Shift Reaction.ACS CATALYSIS,8(2),859-868. |
| MLA | Chen, Yang,et al."Identifying Size Effects of Pt as Single Atoms and Nanoparticles Supported on FeOx for the Water-Gas Shift Reaction".ACS CATALYSIS 8.2(2018):859-868. |
入库方式： OAI收割
来源：大连化学物理研究所
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